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For a year long project for my 4th year of engineering physics at UBC, I decided to build a motorized controller for the zoom ring of DSLR cameras. The goal was to also be able to use it for racking the focus and zoom through out time lapses (used an Arduino microprocessor to take tiny steps between shutters).
The zoom control still has some issues, as there is some play in the mechanism that results in jerky zooms. Hoping to get it worked out in the next month, although school is out for the summer.
The time lapse control seems to work beautifully.
Here's my first test for racking the focus through a time lapse, let me know what you think:
